Under Your Scars made famous by Godsmack
• 9 customizable audio tracks:
(Click, Drum Kit, Bass, Electric Guitar, Lead Electric Guitar, Piano, String Section, Backing Vocals, Lead Vocal)

Unlove You made famous by Jennifer Nettles
• 15 customizable audio tracks:
(Click, Drum Kit, Percussion, Bass, Acoustic Guitar, Acoustic Guitar, Electric Guitar, Distorted Electric Guitar, Lap Steel Guitar, Lead Electric Guitar, Organ, Synth Pad, Synth Strings, Backing Vocals, Lead Vocal)

Underdog made famous by Alicia Keys
• 12 customizable audio tracks:
(Intro Count (Click + Key), Click, Drum Kit, Percussion, Bass, Acoustic Guitar, Piano, Synthesizer, Steel Drums, String Section, Backing Vocals, Lead Vocal)

Unintended made famous by Muse
• 8 customizable audio tracks:
(Click, Drum Kit, Bass, Acoustic Guitar, Organ, Synth Pad, Cello, Lead Vocal)

Unhealthy made famous by Anne-Marie & Shania Twain
• 15 customizable audio tracks:
(Click, Drum Kit, Percussion, Bass, Acoustic Guitar, Acoustic Guitar, Acoustic Guitar, Acoustic Guitar, Electric Guitar, Electric Guitar, Piano, Synthesizer, Backing Vocals, Lead Vocal, Lead Vocal)

Unhealthy made famous by Shania Twain & Anne-Marie
• 15 customizable audio tracks:
(Click, Drum Kit, Percussion, Bass, Acoustic Guitar, Acoustic Guitar, Acoustic Guitar, Acoustic Guitar, Electric Guitar, Electric Guitar, Piano, Synthesizer, Backing Vocals, Lead Vocal, Lead Vocal)

Unser Tag made famous by Helene Fischer
• 13 customizable audio tracks:
(Click, Electronic Drum Kit, Clap, Bass, Acoustic Guitar, Acoustic Guitar, Electric Guitar, Piano, Arpeggiator, String Section, Noise effects, Backing Vocals, Lead Vocal)

Unwound made famous by George Strait
• 11 customizable audio tracks:
(Click, Drum Kit, Bass, Acoustic Guitar, Acoustic Guitar, Rhythm Electric Guitar, Pedal Steel Guitar, Piano, Fiddle, Backing Vocals, Lead Vocal)

Un'avventura made famous by Lucio Battisti
• 12 customizable audio tracks:
(Click, Drum Kit, Bass, Acoustic Guitar, Acoustic Guitar, Electric Guitar, Organ, Xylophone, Brass section, String Section, Backing Vocals, Lead Vocal)

Ugly Heart made famous by G.R.L.
• 15 customizable audio tracks:
(Click, Drum Kit, Percussion, Synth Bass, Acoustic Guitar, Ukulele, Piano, Organ, Synthesizer, Synth Strings, Synth Lead, Synth Brass, Noise effects, Backing Vocals, Lead Vocal)